Automatic inflating device



D. H. SPICER 1,830,249 I AUTOMATIC INFLATING DEVICE Filed March 15, 1930 Nov. 3, 1931.-

DELPI-IIN H. srxcnnponfnnxn'woon, OHIO I 2 AUTOMATIC rnrnn'rrivo nnvron v Application filed llarch 15, 193p. seri rnoi aaaaei.

This invention relates to a pump of the type adapted to be'normally attachedto the v valve stem of an automobilewheelfor the purpose of automatically maintaining proper i air pressure in the tires'at all times and to the combination of such a pump with such a wheel. One object'is to provlde such a pump wvhich will be electricallyoperated. A fur ther object is to provide such an improved ii;- device of a compact'and'efiicient design and embodying numerous improved details of construction and novel arrangement of parts. 5 Other and more-fspecificobjects will become apparent'as thedescription proceeds. p

Fig l is'a schematic sectional view-showj inginyinflating device in position; Fig. 2 is a section on line 22 of Fig. 1;-Fi 3 Y is a section on line 3 3 of Fig. 1;- and T lisa section on line 4+4 of'Fig. 1; V a Infthe'drawings I have illustrated the rim lOoit an automobile wheel containing an in- V ner tube 12 which is provided with a valve stem 13 extending through said rim and upon i *which my improved pump is to be mounted. eer Thre'aded onthe outside of the valve stem 13 is a shell '19 made ofnon-magnetic mate- V -rial, such as brass, and'u-ponwhichis fixedly secured a' magneticmember 2O of'a'generally cylindricalshape and having a flange 21.

so" Around'themember is wound an electric 'coil 22 whichis grounded atone end as shown i qj at23and on the other end is insulated through "the casing and connected'by' means 'ofa' conf ducting clip 24 and insulated rivet 25 to a b'rush 26-which in turn bearsupon a commu- "'tator 27 carried-by the shell 18 of the usual 2 brake 'drum; insulated therefrom by a sheet I 28 andjconnectedthrough a conductor 29 to a suit able source of electric 7 current carried Mei-by the automobile; A magnetic sheath 20 surrounds the coil and an insulating plate 20 covers thetopthereofd '5 The. upper'portion of the non-'magnetic 7 member 19 forms'a portionof an expansible chamber. pump, having an "upper surface 30 Y and openings 31 and 32 therein for the recept-i'on of valves'-'controlling the entrance andd-ischa -ber The valve member '33} permits air to f t -th j hamber; from the atmosphere" ge of air from the pump 'cham-' along the flattened side 34 in the valve stem 3 I I 13; and. thnough' opening 32 past the valve member- 381 into the pump chamber and pre- 'vents:movement ofu-ain'throughsuch open-- ings indthe oppositedirection. The valve 551i;

membe1v36, which holds" the valve portion 38 normally open. against the action of the spring 39,:operates to.v close the opening 31 except: when considerable pressure is exerted by'the movable member-of the pump, llhfifl e;

uid in the chamber-s43 and 43" and is resil iently held: spaced from the magnetic member20rby aspring 43 ofnon-magnetic material. Y The cap-1 43 .isyofmagnetic material, to

be attracted; by. the magnetism in the magnetiomember 20-,andicarries in its upperpor tionanadjusting'valve 45, by means of which is-idetermined' thepressure of inflation at which t hetirewillbe maintained. Extend- .ing overigthe-entire unit is a: shell Q61 which will preferably he made: of) non-magnetic j metal, but may be (made of other suitable material. At the lower end, telescoping-the shell 46; andithreadedon'thestem 13 is a sleeve 1-7 which bears on a fibrous washer 48 which in turn bears against the wheel rim 10. i

In operation, the conductor 29 will be connected to a suitable source ofelectric current; such as abat'tery, and to the commutator 27'. Such commutatorwill'have at the outer edge interruptionswhereby the brush 26 passing 9O thereover will alternately make and break theelectric circuit. 7 rom the brush the current will flow through the rivet '25 and conductor 24130 the'coil 22, alternately energiz- I ng and deenergizing'the same asthe wheel turns. The magnetic member20will thus,

be alternately energized and deenergized, a which will result in its alternately attract-i ing and releaslng the cap 43 which by reason f he pring 43, will be given a'reciprocating movement. I This movement will result in a pumping action which will causeinflation of the tire, the-extent of such inflation 7 being regulated by the" tension on the spring 10 c numerous variant forms Without departing 45* which can be varied by'adjusting the nut f 45?, which may be accomplished by rotating:

the member45. I

While I- have illustrated and described oer-l tain embodiments of my invention, it will be obvious that'the same can be carried out in from the essence of such invention, and I Wish it understood thatI am limited only'in accordance With'the appended claims.-

Havingthus'describedmy invention, l

Icl'aimisz- Q V .1-. 'In'an lnflating device lncludlng a unit adapted to 'be normally attached to the valve stem of an automobile Wheel, a pump mechagnism forming a part of said unit, electrical means'also forming a part of said unitfor actuating said pump, and means operated by rotation ofthe Wheel for alternately connecting and disconnecting said electrical Witllit source of current. e

v 2.?111.an inflatingdevice including a unit I adapted to be normally attached to the Valve stem of'an automobile Wheel, the combination me ans of'said unit with said wheel a pump mechanism forming a part of said unit, electrical means also formmga part-of said-unit for actuating said pump, and means connectedto sa1d un t and operated by rotatlon of sa1d wheelfor energizing; said electrical' means in .7

"such 'a Way asto' operate said pump.

7 .73. In'an inflating.device including a unit-v stem of an automobilewheel,a;pump mecha- 'nism forming apart of said unit, electrical 7 means ior actuatingfsaid pump; and means" operated-by rota'tionof the Wheel alternately energizing; and deenergizing said electrical means, said; last means including a 'co'mmutater and a brush cooperatingtherewith one of hichis carried-by vsaid Wheel; In testimony whereofyl hereunto afiix my signature. l

I v .QD E PHI N Herman] 

